Vikas, rankwise duke and darden are equal. I believe that course work of both schools also is similiar though darden is more on case based study.Work load is also similar. Placement wise things will boil down to your residency status (F1 Vs PR). Duke is more friendly towards PR rather than F1, in terms of admission as well as placement. Darden is more banking friendly, infact great for banking. But if you wanna go to industry or especially healthcare as in marketing then duke is good. Duke is heaven for healthcare industry and also VC friendly. It's totally my personal opinion as a graduating mba from kenan-flagler. Though it is natural for me being "tarheel" to hate Duke but these are my fair insights. Anyway best of luck and lemme know if you need more info.